Horace wyman



H. WYMAN.

(No Model.)

VISE.

No. 340,930.. Pate nted Apr. 27, 1886..

| I I I l \Wih E5 5 E5.

6 Jxm U ITED STATES PATENT ()rrrcn.

HORACE \VYMAN, OF WORCESTER, MASSACHUSETTS.

VISE.

SPECIFICATION forming part of Letters Patent No. 340,930, dated April 27, 1886,

Application filed August 24, 1885. Serial No. 175,182. (No model.)

To aZZ whom, it may concern.-

Be it known that I, HORACE WYMAN, of \Vorcester, county of W'orcester, State of Massachusetts, have invented an Iinprovementin Bench-Vises, of which the following description, in connection with the accompanying drawings, is a specification, like letters on the drawings representing like parts.

This invention has forits object to construct a bench-vise which may be readily and quickly operated to firmly grip material of various thicknesses.

The invention relates to that class of vise which comprises a fixed jaw provided on its under side with a rack-bar and a movablejaw sliding with relation to the fixed jaw and carrying a shaft provided with a worm ,con1bined with a block engaged by the said worm, and having teeth upon its upper side to engage with the teeth of the rack-bar, and inclined bearing-faces on its under side to cooperate with inclined bearing -shoulders preferably made integral with the movable jaw, and acting to cause the said block as it is moved by the rotation of the worm to rise and fall upon the inclined bearing-shoulders, to thus engage or disengage the rack'bar.

In my invention the block engages stat-ionary inclines, and the fixed jaw is provided longitudinally upon its under side with flanges, which serve to support the movable jaw with its engaging mechanism, said movable jaw being provided with corresponding flanges to move upon the flanges of the fixed jaw and permit the movable jaw to be drawn back and forth at will.

Figure 1 is alongitudinal section of a benchvise constructed in accordance with this invention, the portion of the frame-work or bench to which the same is attached being shown in dotted lines; Fig. 2, a crosssection of the vise, taken on the dotted line as at, Fig. 1; and Figs. 3 and 4, details of the ratchettoothed block to be referred to.

The fixed'jaw A, secured to any suitable frame-work or bench, A, is provided on its under side with arack-bar, B. The fixed jaw A is provided on its under side with inturned flanges a, (see Fig. 2,) which support and permit an easy longitudinal movement thereon of the movable jaw C, which is provided with corresponding outwardly-turned flanges a. The movable jaw O is provided with a biting-face, c, which cooperates with the biting-face a of the fixed jaw, to grip any material which may be placed between them. The movable jaw G carries an oscillating shaft, 6, passing lengthwise of the same, and mounted in suitable bearings at each end, said shaft being oscillated by the hand-lever e, secured to the forward end thereof to be readily accessible to the operator. The shaft 6 has mounted upon it at or near its rear end a worm, e, which engages the block f, which latter is provided on its upper side with teeth adapted to engage the teeth of the rack-barB of the fixed jaw A. The block is moved back and forth by the rotation or oscillation of the worm c and is provided upon its lower surface with inclined or beveled faces f, preferably at each end, which rest upon inclined bearing-shoulders f, preferably made integral with movable jaw O, so that as the said ratchet-toothed block is moved back and forth by the worm it will rise and fall upon the inclined bearingshoulders. V

The block fis preferably composed of one piece, as shown in Fig.4; but it is obvious that the same may be composed of two pieces, one of which, containing the screw-threaded portion to engage the worm, being fitted into the ratchet-toothed portion of the block.

To grip any material which it may be desired to place between the jaws, the operatorgrasps the hand-lever e" in the position shown in Fig. 1, and draws the movablejaw Otoward or from the jaw A, according to the thickness of the material. The material is then placed between the jaws, the jaw G forced against it, and the hand-lever e is turned half of a revolution, which movement causes the blockf to move forward upon the inclined bearingshoulders f and the ratchet-teeth of the said block f to engage the teeth of the rack-bar B. It will be seen that the block f is provided with four bearingfaces, so as to secure the utmost strength.

In order to have the teeth of the block fengage the rack properly, the under side of the inclined faces f are adapted to slide over the top of the inclined blocks f when the block is fully raised, so that the teeth may be fully engaged with each other in any position of the jaws. When the teeth of the rack are thus fully interlocked, further movement of the shaft 6 tends to draw the jaws closer to- 5 gether, firmly gripping anything that is interposed between the jaws.

I do not broadly claim a vise having a fixed jaw provided on its under side with a rackbar, and a movable jaw sliding upon said fixed IO jaw, and carrying a screw'shaft which operates a toothed block to engage said rack-bar to hold the movable jaw in desired position, said block having inclined shoulders co-operating with inclined lugs or bearing-surfaces 15 on or moved by the screw-shaft to elevate'said block 'when moved by the shaft into engagement with the rack-bar.

I claim- Vitnesses:

J. A. WVARE, O. M. EDwARDs. 

